Code: The Hidden Language of Computer Hardware and Software

Code: The Hidden Language of Computer Hardware and Software by Charles Petzold is one of the most elegant and intellectually satisfying books ever written about computers. Starting from first principles with flashlights and Morse code, Petzold builds up the entire conceptual architecture of a computer. Boolean logic, logic gates, flip flops, memory, CPUs, machine code, and operating systems  in a way that any curious person can follow without prior technical knowledge. Each chapter builds precisely on the last, creating a cumulative understanding that is genuinely illuminating. By the end of the book, readers understand not just how to use a computer, but why computers work the way they do. A masterpiece of technical exposition.